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Method for removing toluene by catalytic oxidation

A technology of catalytic oxidation and toluene, applied in combustion methods, incinerators, lighting and heating equipment, etc., can solve the problems of mucous membrane irritation, central nervous system anesthesia, water environment pollution, etc., to prolong catalyst life and catalytic activity Good, low load effect

Inactive Publication Date: 2015-06-03
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have found that toluene is irritating to the skin and mucous membranes, has an anesthetic effect on the central nervous system, and pollutes the water environment.

Method used

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  • Method for removing toluene by catalytic oxidation

Examples

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specific Embodiment approach

[0025] The specific implementation of technical scheme of the present invention is as follows:

[0026] Step 1. Take 4.5mmol of cerium nitrate hexahydrate with a mass of 1.9540g, dissolve it in 90ml of sodium hydroxide solution with a concentration of 6mol / L, transfer it into a 100ml polytetrafluoroethylene reactor and stir for 10min, after stirring evenly, Put it in a high-pressure reactor at 100°C for hydrothermal reaction for 24 h, cool it, wash it with deionized water until neutral, dry the precipitate at 105°C, grind it and roast it in a muffle furnace at 400°C for 4 hours. h, to obtain rod-shaped nano ceria.

[0027] Step 2, take 1.0 g of rod-shaped nano-cerium oxide and add 0.9423ml to a concentration of 5.5290×10 -3 g / ml palladium acetate solution, stirred at room temperature for 2 h, evaporated to dryness in a water bath at 90°C, dried at 105°C, ground and roasted in a muffle furnace at 400°C for 4 h to obtain palladium on ceria (Pd / CeO 2 ) catalyst, the mass perc...

Embodiment 2

[0033] In step 4, the reaction temperature is 220° C., other conditions are the same as in Example 1, and the removal rate of toluene is 68.5%.

Embodiment 3

[0035] In step 4, the reaction temperature is 230° C., other conditions are the same as in Example 1, and the removal rate of toluene is 83.0%.

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Abstract

The invention relates to the technical field of treatment of a volatile substance toluene, in particular to a method for removing toluene by oxidation under the catalysis of rod-like nanometer cerium dioxide-loaded palladium. According to the method for removing toluene by catalytic oxidation, cerium dioxide-loaded palladium is taken as a catalyst, and toluene is removed by oxidative combustion. According to the method, cerium dioxide-loaded palladium is taken as the catalyst, toluene is treated by an oxidation combustion method, and no related reports about the treatment of toluene in the presence of the catalyst in the prior art are made, and by the method, toluene is oxidized into carbon dioxide, so that obvious removal effects are achieved. Rod-like nanometer cerium dioxide is selected as a carrier, and compared with common nanoparticles cerium dioxide-loaded palladium, rod-like nanometer cerium dioxide-loaded palladium has the advantages that the catalytic activity is high, and better catalytic treatment effects can be achieved.

Description

technical field [0001] The invention relates to the technical field of toluene treatment of volatile substances, in particular to a method for removing toluene by catalytic oxidation of palladium supported on rod-shaped nano ceria. Background technique [0002] Volatile organic compounds (VOCs) are a major class of air pollutants that pose serious hazards to human health and the environment. As a typical volatile organic compound, toluene is widely used in chemical manufacturing industries such as decorative materials, solvents and paint coatings. Toluene has become one of the main pollutants of indoor air due to the toluene contained in interior decoration materials such as paints, adhesives, wallpapers and daily chemicals such as perfumes and detergents. Studies have found that toluene is irritating to the skin and mucous membranes, has an anesthetic effect on the central nervous system, and pollutes the water environment. Therefore, removing toluene in the air is of gre...

Claims

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Application Information

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IPC IPC(8): F23G7/07B01J23/63
CPCF23G7/07B01J23/63
Inventor 万海勤谷广锋王红培朱熙韩玉香郑寿荣许昭怡
Owner NANJING UNIV
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